Yeah, sometimes it seems like the bitcoin-core developers are focussed on developing bitcoin-core.
Do you not understand that having a functional client is absolutely essential, and that without it the network just doesn't work? We can't all use SPV clients - what would they connect to?
I think where you're going wrong is in thinking that "we" have or are looking for "investors".
Anyway, if there is no demand for bitcoin why is it trading at over $200 per unit?
I think where you are going wrong is thinking the development team of a coin is responsible solely on the core and the wallet, there is more to a coin than just that!
Do you understand the meaning if it aint broke dont fix it, if you have to fix it make sure it works!! ? You had 100 people working on an update and you still have some transaction times between 30 to 120 minutes, (with or without a fee added)so what have they really done? I noticed no change on my end as a user, as a coder I see a lot, but at the end of the rope, users care none about the programming they care about how fast their transactions get processed, if they have to wait 2 hours adaptation and adoption becomes a hard goal to achieve!!!
Bitcoin needed investors from day one without them bitcoin would be NOWHERE, investors bought the coins and helped to jump start the block chain, they bought mining hardware and helped secure the chain, without them "you" would have nothing, no transactions to process, no blockchain, and you sill need them, more now than before actually with a difficulty of over 40 billion. So, dont kick the gift horse in the mouth now because you feel you milked that tit dry and dont need it anymore. Because, in todays crytpo industry, attitude like that will bury your precious bitcoin and it will be replaced by a coin with a development team who cares about all the aspects of developing a coin, especially the people who pay the bills (investors)
I can see you are completely uneducated on trading and how it works, let me help you. The only thing bitcoin has is its tradable value, thats why it trades at over 200 bucks a coin ( the investors is why) in all actuality there is no demand for it at all.
Example: When china needs a product from japan they have a demand for the Japanese Yen, thus they buy it, then the value increases.
With bitcoin there is nothing that makes people have a need or a want to buy it "EXCEPT" the fact they can buy a few and sell a few and maybe make a profit doing it. (ITS TRADABLE MARKET) this si not a demand this is a hobby. A demand would be providing a service or a product you can only buy with bitcoins, something we need but you can not buy with cash.